Process for producing colored photographs on linen



Umran STATES PATENT Urrrcn;

LOUIS GRAB, or VAN BUREN, ARKANSAS.

PROCESS FOR PRODUCING ooroa -zb PHOTOGRAPHS 0N LINEN.

SPECIFICATION, forming part of' Letters Patent Zhl'o. 229,694, datedJuly 6, 1880.

Application filed November 25, 1879.

I To all whom it may concern:

Be it known that I, LOUIS GRAF, of Van Buren'fin. the county of Crawfordand State of Arkansas, have invented a new and useful Improvement in,the Process for Producing "Colored Photogr'aphson Linen. or otherMaterial, of which the. following is a specification. This inventionrelates to. the production of colored photographsupon linenor othermaterial; and itis an improvement on the process for which UUltQdStfitGS Letters Patent No.

- 220,435, dated October 7, 1879, were granted to Johannes Schumacher,of Roemische Posel, Saxony, G'ermanyywhich Letters Patent were assignedto me. 4

- The invention consists in printinga copy of the photograph from thenegative onto the prepared linen, making thesame transparent by means ofa light coat of varnishfand then painting the back of the picture'withoil-col- In carrying out my invention the linen, cotton ,or other Inaterialis first washed thoroughly until all the starch has been Washedout, and is then mounted on a stretcher and dried. When perfectly drythe following solution is applied with a brush. or in some othersuitable manner. r

The solution is prepared as follows: Seven grams (108.08 grains) ofdistilled water, eight grams (123.52 grains) of nitrate of silver, andfifty grains (1 ounce 4 drams 52 grains) of absolute alcohol areinixedto produce the solution ISO. 1. Thirty grams (Tdrams 43.20 grains) ofabsolute alcohol and two grams (30.88 grains) of chloride of calcium aremixed to produce solution No. Thirty grams ('7 drains 43.20 grains) ofabsolute alcohol and two grams (30.88 grains) of citric acid. are mixedto produce solution No. 3. About two hundred and fifty grams (8.81ounces) of ordinary collodion are gradually added to the solution No. 1,which is shaken constantly during the mixing. To this mixture solutionNo. 2 is then added, drop by drop, under constant shaking, after whichsolution No. 3 is added in the same manner. The mixture is now ready foruse in preparing the linen, cotton, or other material.

The proportions given above are preferred, but may be varied.

A strong copy of the photograph is now printed onto the prepared linenfrom the negative, and is fixed by a solution of one part ofhyposulphite of sodium and ten-parts of dis-. tilled water.

- The picture or the entire linen is made transparent by means of alight coat of varnish or someother similar suitable material., The rearside of th'epicture is then paintedWith'oiI-colors in a lightsketchingmanner. The picture need not be painted very accurately, nor with anyspecial attention to shades or shadows, as they are shown by thephotograph, which is not transferred onto the linen, but printeddirectly onto. it, and is entirely embodied in the linen,

cotton, or other material. 1

Any other kind of colors may be used, but

oil-colors are preferable.

ztrate of silver, absolute alcohol, chloride of calcium, citric acid,and ordinary collodion,1n

or about the proportions hereinbefore specified. I LOUIS GEAR.

Witnesses:

J. A. THAYER, FRANK IBBOTSON.

. 75, as new and desire to secure by Letters Pat-

